Pre heat your oven to 180 deg C and line two baking trays with baking paper.
Using an electric mixer, beat the butter, sugar and vanilla extract until very light and creamy. Add the egg and mix until well combined.
Proceed to sift the flour into the creamed butter mixture and fold everything together until you have a soft but useable dough. If you find it’s sticky add some flour a little at a time until you reach the correct consistency.
Using floured hands shape a teaspoonful of dough into a ball and place on a baking tray a few cms apart. Using your floured index finger pierce the center of each ball to make a well. Spoon half a teaspoon of jam into each biscuit.
Bake in the oven for 15 mins or until the jam drops are nice and golden (shouldn’t be more than 15 mins).